Floyd Mayweather vs. Robert Guerrero

CaptionFloyd Mayweather Jr.

Al Bello / Getty Images

Floyd Mayweather Jr. celebrates with his cornermen after retaining the WBC welterweight title belt with a unanimous decision over Robert Guerrero on Saturday night at the MGM Grand Garden Arena in Las Vegas.

Floyd Mayweather Jr. celebrates with his cornermen after retaining the WBC welterweight title belt with a unanimous decision over Robert Guerrero on Saturday night at the MGM Grand Garden Arena in Las Vegas. (Al Bello / Getty Images)

Robert Guerrero listens to his father and trainer, Ruben Guerrero, as he rests after the ninth round of his WBC welterweight title bout against Floyd Mayweather Jr. on Saturday night in Las Vegas.

Robert Guerrero listens to his father and trainer, Ruben Guerrero, as he rests after the ninth round of his WBC welterweight title bout against Floyd Mayweather Jr. on Saturday night in Las Vegas. (Isaac Brekken / Associated Press)

Floyd Mayweather Jr. remains unbeaten in 44 fights after earning a unanimous decision over Robert Guerrero in their WBC welterweight title fight on Saturday night at the MGM Grand Garden Arena in Las Vegas.